El Niño and La Niña - Timeline for El Nino

References:
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of Southern California kelp forest communities. (1991, October 31). Retrieved March 2012 from The Marine Ecological Progress Series: http://www.intres.com/articles/meps/77/m077p049.pdf

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9. Kelly, Gloria; Henson, Bob; Schmidt, Cynthia; Glantz, Michael. Why Should We Care About El Nino? (1998). Retrieved March 2012 from Science Now: http://www.proquestk12.com/curr/snow/snowwn98/snowwin98.htm
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11. Georgia Institute of Technology. New Type Of El Nino Could Mean More Hurricanes Make Landfall. (2009, July 2). Retrieved March 2012 from ScienceDaily: http://www.sciencedaily.com/releases/2009/07/090702140835.htm8+